721 lines
30 KiB
C++
721 lines
30 KiB
C++
#include "rendering/sdl3gpu/sdl3gpu_shader.hpp"
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#include <SDL3/SDL_log.h>
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#include <algorithm> // std::min, std::max, std::floor
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#include <cmath> // std::floor
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#include <cstring> // memcpy, strlen
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#ifndef __APPLE__
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#include "rendering/sdl3gpu/postfx_frag_spv.h"
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#include "rendering/sdl3gpu/postfx_vert_spv.h"
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#endif
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#ifdef __APPLE__
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// ============================================================================
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// MSL shaders (Metal Shading Language) — macOS
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// ============================================================================
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// NOLINTBEGIN(readability-identifier-naming)
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static const char* POSTFX_VERT_MSL = R"(
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#include <metal_stdlib>
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using namespace metal;
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struct PostVOut {
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float4 pos [[position]];
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float2 uv;
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};
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vertex PostVOut postfx_vs(uint vid [[vertex_id]]) {
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const float2 positions[3] = { {-1.0, -1.0}, {3.0, -1.0}, {-1.0, 3.0} };
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const float2 uvs[3] = { { 0.0, 1.0}, {2.0, 1.0}, { 0.0,-1.0} };
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PostVOut out;
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out.pos = float4(positions[vid], 0.0, 1.0);
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out.uv = uvs[vid];
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return out;
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}
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)";
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static const char* POSTFX_FRAG_MSL = R"(
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#include <metal_stdlib>
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using namespace metal;
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struct PostVOut {
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float4 pos [[position]];
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float2 uv;
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};
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struct PostFXUniforms {
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float vignette_strength;
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float chroma_strength;
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float scanline_strength;
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float screen_height;
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float mask_strength;
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float gamma_strength;
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float curvature;
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float bleeding;
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float pixel_scale;
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float time;
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float oversample; // 1.0 = sin SS, 3.0 = 3× supersampling
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float flicker; // 0 = off, 1 = phosphor flicker ~50 Hz
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};
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// YCbCr helpers for NTSC bleeding
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static float3 rgb_to_ycc(float3 rgb) {
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return float3(
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0.299f*rgb.r + 0.587f*rgb.g + 0.114f*rgb.b,
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-0.169f*rgb.r - 0.331f*rgb.g + 0.500f*rgb.b + 0.5f,
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0.500f*rgb.r - 0.419f*rgb.g - 0.081f*rgb.b + 0.5f
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);
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}
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static float3 ycc_to_rgb(float3 ycc) {
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float y = ycc.x;
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float cb = ycc.y - 0.5f;
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float cr = ycc.z - 0.5f;
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return clamp(float3(
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y + 1.402f*cr,
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y - 0.344f*cb - 0.714f*cr,
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y + 1.772f*cb
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), 0.0f, 1.0f);
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}
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fragment float4 postfx_fs(PostVOut in [[stage_in]],
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texture2d<float> scene [[texture(0)]],
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sampler samp [[sampler(0)]],
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constant PostFXUniforms& u [[buffer(0)]]) {
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float2 uv = in.uv;
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// Curvatura barrel CRT
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if (u.curvature > 0.0f) {
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float2 c = uv - 0.5f;
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float rsq = dot(c, c);
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float2 dist = float2(0.05f, 0.1f) * u.curvature;
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float2 barrelScale = 1.0f - 0.23f * dist;
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c += c * (dist * rsq);
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c *= barrelScale;
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if (abs(c.x) >= 0.5f || abs(c.y) >= 0.5f) {
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return float4(0.0f, 0.0f, 0.0f, 1.0f);
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}
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uv = c + 0.5f;
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}
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// Muestra base
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float3 base = scene.sample(samp, uv).rgb;
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// Sangrado NTSC — difuminado horizontal de crominancia.
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// step = 1 pixel de juego en espacio UV (corrige SS: scene.get_width() = game_w * oversample).
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float3 colour;
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if (u.bleeding > 0.0f) {
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float tw = float(scene.get_width());
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float step = u.oversample / tw; // 1 pixel lógico en UV
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float3 ycc = rgb_to_ycc(base);
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float3 ycc_l2 = rgb_to_ycc(scene.sample(samp, uv - float2(2.0f*step, 0.0f)).rgb);
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float3 ycc_l1 = rgb_to_ycc(scene.sample(samp, uv - float2(1.0f*step, 0.0f)).rgb);
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float3 ycc_r1 = rgb_to_ycc(scene.sample(samp, uv + float2(1.0f*step, 0.0f)).rgb);
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float3 ycc_r2 = rgb_to_ycc(scene.sample(samp, uv + float2(2.0f*step, 0.0f)).rgb);
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ycc.yz = (ycc_l2.yz + ycc_l1.yz*2.0f + ycc.yz*2.0f + ycc_r1.yz*2.0f + ycc_r2.yz) / 8.0f;
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colour = mix(base, ycc_to_rgb(ycc), u.bleeding);
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} else {
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colour = base;
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}
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// Aberración cromática (drift animado con time para efecto NTSC real)
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float ca = u.chroma_strength * 0.005f * (1.0f + 0.15f * sin(u.time * 7.3f));
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colour.r = scene.sample(samp, uv + float2(ca, 0.0f)).r;
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colour.b = scene.sample(samp, uv - float2(ca, 0.0f)).b;
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// Corrección gamma (linealizar antes de scanlines, codificar después)
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if (u.gamma_strength > 0.0f) {
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float3 lin = pow(colour, float3(2.4f));
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colour = mix(colour, lin, u.gamma_strength);
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}
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// Scanlines — 1 pixel físico oscuro por fila lógica.
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// Usa uv.y (independiente del offset de letterbox) con pixel_scale para
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// calcular la posición dentro de la fila en coordenadas físicas.
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// 3x: 1 dark + 2 bright. 4x: 1 dark + 3 bright.
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// bright=3.5×, dark floor=0.42 (mantiene aspecto CRT original).
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if (u.scanline_strength > 0.0f) {
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float ps = max(1.0f, round(u.pixel_scale));
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float frac_in_row = fract(uv.y * u.screen_height);
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float row_pos = floor(frac_in_row * ps);
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float is_dark = step(ps - 1.0f, row_pos);
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float scan = mix(3.5f, 0.42f, is_dark);
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colour *= mix(1.0f, scan, u.scanline_strength);
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}
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if (u.gamma_strength > 0.0f) {
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float3 enc = pow(colour, float3(1.0f/2.2f));
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colour = mix(colour, enc, u.gamma_strength);
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}
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// Viñeta
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float2 d = uv - 0.5f;
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float vignette = 1.0f - dot(d, d) * u.vignette_strength;
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colour *= clamp(vignette, 0.0f, 1.0f);
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// Máscara de fósforo RGB — después de scanlines (orden original):
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// filas brillantes saturadas → máscara invisible, filas oscuras → RGB visible.
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if (u.mask_strength > 0.0f) {
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float whichMask = fract(in.pos.x * 0.3333333f);
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float3 mask = float3(0.80f);
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if (whichMask < 0.3333333f) mask.x = 1.0f;
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else if (whichMask < 0.6666667f) mask.y = 1.0f;
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else mask.z = 1.0f;
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colour = mix(colour, colour * mask, u.mask_strength);
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}
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// Parpadeo de fósforo CRT (~50 Hz)
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if (u.flicker > 0.0f) {
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float flicker_wave = sin(u.time * 100.0f) * 0.5f + 0.5f;
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colour *= 1.0f - u.flicker * 0.04f * flicker_wave;
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}
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return float4(colour, 1.0f);
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}
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)";
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// NOLINTEND(readability-identifier-naming)
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#endif // __APPLE__
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namespace Rendering {
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// ---------------------------------------------------------------------------
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// Destructor
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// ---------------------------------------------------------------------------
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SDL3GPUShader::~SDL3GPUShader() {
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destroy();
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}
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// ---------------------------------------------------------------------------
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// init
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// ---------------------------------------------------------------------------
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auto SDL3GPUShader::init(SDL_Window* window,
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SDL_Texture* texture,
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const std::string& /*vertex_source*/,
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const std::string& /*fragment_source*/) -> bool {
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// Si ya estaba inicializado (p.ej. al cambiar borde), liberar recursos
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// de textura/pipeline pero mantener el device vivo para evitar conflictos
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// con SDL_Renderer en Windows/Vulkan.
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if (is_initialized_) {
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cleanup();
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}
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window_ = window;
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// Dimensions from the SDL_Texture placeholder
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float fw = 0.0F;
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float fh = 0.0F;
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SDL_GetTextureSize(texture, &fw, &fh);
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game_width_ = static_cast<int>(fw);
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game_height_ = static_cast<int>(fh);
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tex_width_ = game_width_ * oversample_;
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tex_height_ = game_height_ * oversample_;
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uniforms_.screen_height = static_cast<float>(tex_height_); // Altura de la textura GPU
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uniforms_.oversample = static_cast<float>(oversample_);
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// ----------------------------------------------------------------
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// 1. Create GPU device (solo si no existe ya)
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// ----------------------------------------------------------------
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if (device_ == nullptr) {
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#ifdef __APPLE__
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const SDL_GPUShaderFormat PREFERRED = SDL_GPU_SHADERFORMAT_MSL | SDL_GPU_SHADERFORMAT_METALLIB;
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#else
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const SDL_GPUShaderFormat PREFERRED = SDL_GPU_SHADERFORMAT_SPIRV;
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#endif
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device_ = SDL_CreateGPUDevice(PREFERRED, false, nullptr);
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if (device_ == nullptr) {
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SDL_Log("SDL3GPUShader: SDL_CreateGPUDevice failed: %s", SDL_GetError());
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return false;
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}
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SDL_Log("SDL3GPUShader: driver = %s", SDL_GetGPUDeviceDriver(device_));
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// ----------------------------------------------------------------
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// 2. Claim window (una sola vez — no liberar hasta destroy())
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// ----------------------------------------------------------------
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if (!SDL_ClaimWindowForGPUDevice(device_, window_)) {
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SDL_Log("SDL3GPUShader: SDL_ClaimWindowForGPUDevice failed: %s", SDL_GetError());
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SDL_DestroyGPUDevice(device_);
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device_ = nullptr;
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return false;
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}
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SDL_SetGPUSwapchainParameters(device_, window_, SDL_GPU_SWAPCHAINCOMPOSITION_SDR, vsync_ ? SDL_GPU_PRESENTMODE_VSYNC : SDL_GPU_PRESENTMODE_IMMEDIATE);
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}
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// ----------------------------------------------------------------
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// 3. Create scene texture (upload target + sampler source)
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// Format: B8G8R8A8_UNORM matches SDL ARGB8888 byte layout on LE
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// ----------------------------------------------------------------
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SDL_GPUTextureCreateInfo tex_info = {};
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tex_info.type = SDL_GPU_TEXTURETYPE_2D;
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tex_info.format = SDL_GPU_TEXTUREFORMAT_B8G8R8A8_UNORM;
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tex_info.usage = SDL_GPU_TEXTUREUSAGE_SAMPLER;
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tex_info.width = static_cast<Uint32>(tex_width_);
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tex_info.height = static_cast<Uint32>(tex_height_);
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tex_info.layer_count_or_depth = 1;
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tex_info.num_levels = 1;
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scene_texture_ = SDL_CreateGPUTexture(device_, &tex_info);
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if (scene_texture_ == nullptr) {
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SDL_Log("SDL3GPUShader: failed to create scene texture: %s", SDL_GetError());
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cleanup();
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return false;
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}
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// ----------------------------------------------------------------
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// 4. Create upload transfer buffer (CPU → GPU, size = w*h*4 bytes)
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// ----------------------------------------------------------------
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SDL_GPUTransferBufferCreateInfo tb_info = {};
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tb_info.usage = SDL_GPU_TRANSFERBUFFERUSAGE_UPLOAD;
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tb_info.size = static_cast<Uint32>(tex_width_ * tex_height_ * 4);
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upload_buffer_ = SDL_CreateGPUTransferBuffer(device_, &tb_info);
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if (upload_buffer_ == nullptr) {
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SDL_Log("SDL3GPUShader: failed to create upload buffer: %s", SDL_GetError());
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cleanup();
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return false;
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}
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// ----------------------------------------------------------------
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// 5. Create samplers: NEAREST (pixel art) + LINEAR (supersampling)
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// ----------------------------------------------------------------
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SDL_GPUSamplerCreateInfo samp_info = {};
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samp_info.min_filter = SDL_GPU_FILTER_NEAREST;
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samp_info.mag_filter = SDL_GPU_FILTER_NEAREST;
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samp_info.mipmap_mode = SDL_GPU_SAMPLERMIPMAPMODE_NEAREST;
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samp_info.address_mode_u = SDL_GPU_SAMPLERADDRESSMODE_CLAMP_TO_EDGE;
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samp_info.address_mode_v = SDL_GPU_SAMPLERADDRESSMODE_CLAMP_TO_EDGE;
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samp_info.address_mode_w = SDL_GPU_SAMPLERADDRESSMODE_CLAMP_TO_EDGE;
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sampler_ = SDL_CreateGPUSampler(device_, &samp_info);
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if (sampler_ == nullptr) {
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SDL_Log("SDL3GPUShader: failed to create sampler: %s", SDL_GetError());
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cleanup();
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return false;
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}
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SDL_GPUSamplerCreateInfo lsamp_info = {};
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lsamp_info.min_filter = SDL_GPU_FILTER_LINEAR;
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lsamp_info.mag_filter = SDL_GPU_FILTER_LINEAR;
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lsamp_info.mipmap_mode = SDL_GPU_SAMPLERMIPMAPMODE_NEAREST;
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lsamp_info.address_mode_u = SDL_GPU_SAMPLERADDRESSMODE_CLAMP_TO_EDGE;
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lsamp_info.address_mode_v = SDL_GPU_SAMPLERADDRESSMODE_CLAMP_TO_EDGE;
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lsamp_info.address_mode_w = SDL_GPU_SAMPLERADDRESSMODE_CLAMP_TO_EDGE;
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linear_sampler_ = SDL_CreateGPUSampler(device_, &lsamp_info);
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if (linear_sampler_ == nullptr) {
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SDL_Log("SDL3GPUShader: failed to create linear sampler: %s", SDL_GetError());
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cleanup();
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return false;
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}
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// ----------------------------------------------------------------
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// 6. Create PostFX graphics pipeline
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// ----------------------------------------------------------------
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if (!createPipeline()) {
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cleanup();
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return false;
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}
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is_initialized_ = true;
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SDL_Log("SDL3GPUShader: initialized OK (%dx%d)", tex_width_, tex_height_);
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return true;
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}
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// ---------------------------------------------------------------------------
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// createPipeline
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// ---------------------------------------------------------------------------
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auto SDL3GPUShader::createPipeline() -> bool {
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const SDL_GPUTextureFormat SWAPCHAIN_FMT = SDL_GetGPUSwapchainTextureFormat(device_, window_);
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#ifdef __APPLE__
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SDL_GPUShader* vert = createShaderMSL(device_, POSTFX_VERT_MSL, "postfx_vs", SDL_GPU_SHADERSTAGE_VERTEX, 0, 0);
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SDL_GPUShader* frag = createShaderMSL(device_, POSTFX_FRAG_MSL, "postfx_fs", SDL_GPU_SHADERSTAGE_FRAGMENT, 1, 1);
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#else
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SDL_GPUShader* vert = createShaderSPIRV(device_, kpostfx_vert_spv, kpostfx_vert_spv_size, "main", SDL_GPU_SHADERSTAGE_VERTEX, 0, 0);
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SDL_GPUShader* frag = createShaderSPIRV(device_, kpostfx_frag_spv, kpostfx_frag_spv_size, "main", SDL_GPU_SHADERSTAGE_FRAGMENT, 1, 1);
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#endif
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if ((vert == nullptr) || (frag == nullptr)) {
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SDL_Log("SDL3GPUShader: failed to compile PostFX shaders");
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if (vert != nullptr) { SDL_ReleaseGPUShader(device_, vert); }
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if (frag != nullptr) { SDL_ReleaseGPUShader(device_, frag); }
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return false;
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}
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SDL_GPUColorTargetBlendState no_blend = {};
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no_blend.enable_blend = false;
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no_blend.enable_color_write_mask = false;
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SDL_GPUColorTargetDescription color_target = {};
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color_target.format = SWAPCHAIN_FMT;
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color_target.blend_state = no_blend;
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SDL_GPUVertexInputState no_input = {};
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SDL_GPUGraphicsPipelineCreateInfo pipe_info = {};
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pipe_info.vertex_shader = vert;
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pipe_info.fragment_shader = frag;
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pipe_info.vertex_input_state = no_input;
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pipe_info.primitive_type = SDL_GPU_PRIMITIVETYPE_TRIANGLELIST;
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pipe_info.target_info.num_color_targets = 1;
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pipe_info.target_info.color_target_descriptions = &color_target;
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pipeline_ = SDL_CreateGPUGraphicsPipeline(device_, &pipe_info);
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SDL_ReleaseGPUShader(device_, vert);
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SDL_ReleaseGPUShader(device_, frag);
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if (pipeline_ == nullptr) {
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SDL_Log("SDL3GPUShader: pipeline creation failed: %s", SDL_GetError());
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return false;
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}
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return true;
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}
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// ---------------------------------------------------------------------------
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// uploadPixels — copies ARGB8888 CPU pixels into the GPU transfer buffer.
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// Con supersampling (oversample_ > 1) expande cada pixel del juego a un bloque
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// oversample × oversample y hornea la scanline oscura en la última fila del bloque.
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// ---------------------------------------------------------------------------
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void SDL3GPUShader::uploadPixels(const Uint32* pixels, int width, int height) {
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if (!is_initialized_ || (upload_buffer_ == nullptr)) { return; }
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void* mapped = SDL_MapGPUTransferBuffer(device_, upload_buffer_, false);
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if (mapped == nullptr) {
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SDL_Log("SDL3GPUShader: SDL_MapGPUTransferBuffer failed: %s", SDL_GetError());
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return;
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}
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if (oversample_ <= 1) {
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// Path sin supersampling: copia directa
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std::memcpy(mapped, pixels, static_cast<size_t>(width * height * 4));
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} else {
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// Path con supersampling: expande cada pixel a OS×OS, oscurece última fila.
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// Replica la fórmula del shader: mix(3.5, 0.42, scanline_strength).
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auto* out = static_cast<Uint32*>(mapped);
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const int OS = oversample_;
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const float BRIGHT_MUL = 1.0F + (baked_scanline_strength_ * 2.5F); // rows 0..OS-2
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const float DARK_MUL = 1.0F - (baked_scanline_strength_ * 0.58F); // row OS-1
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for (int y = 0; y < height; ++y) {
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for (int x = 0; x < width; ++x) {
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const Uint32 SRC = pixels[(y * width) + x];
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const Uint32 ALPHA = (SRC >> 24) & 0xFFU;
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const auto FR = static_cast<float>((SRC >> 16) & 0xFFU);
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const auto FG = static_cast<float>((SRC >> 8) & 0xFFU);
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const auto FB = static_cast<float>(SRC & 0xFFU);
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auto make_px = [ALPHA](float rv, float gv, float bv) -> Uint32 {
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auto cl = [](float v) -> Uint32 { return static_cast<Uint32>(std::min(255.0F, v)); };
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return (ALPHA << 24) | (cl(rv) << 16) | (cl(gv) << 8) | cl(bv);
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};
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const Uint32 BRIGHT = make_px(FR * BRIGHT_MUL, FG * BRIGHT_MUL, FB * BRIGHT_MUL);
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const Uint32 DARK = make_px(FR * DARK_MUL, FG * DARK_MUL, FB * DARK_MUL);
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for (int dy = 0; dy < OS; ++dy) {
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const Uint32 OUT_PX = (dy == OS - 1) ? DARK : BRIGHT;
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const int DST_Y = (y * OS) + dy;
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for (int dx = 0; dx < OS; ++dx) {
|
||
out[(DST_Y * (width * OS)) + ((x * OS) + dx)] = OUT_PX;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
SDL_UnmapGPUTransferBuffer(device_, upload_buffer_);
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// render — upload scene texture + PostFX pass → swapchain
|
||
// ---------------------------------------------------------------------------
|
||
void SDL3GPUShader::render() {
|
||
if (!is_initialized_) { return; }
|
||
|
||
SDL_GPUCommandBuffer* cmd = SDL_AcquireGPUCommandBuffer(device_);
|
||
if (cmd == nullptr) {
|
||
SDL_Log("SDL3GPUShader: SDL_AcquireGPUCommandBuffer failed: %s", SDL_GetError());
|
||
return;
|
||
}
|
||
|
||
// ---- Copy pass: transfer buffer → scene texture ----
|
||
SDL_GPUCopyPass* copy = SDL_BeginGPUCopyPass(cmd);
|
||
if (copy != nullptr) {
|
||
SDL_GPUTextureTransferInfo src = {};
|
||
src.transfer_buffer = upload_buffer_;
|
||
src.offset = 0;
|
||
src.pixels_per_row = static_cast<Uint32>(tex_width_);
|
||
src.rows_per_layer = static_cast<Uint32>(tex_height_);
|
||
|
||
SDL_GPUTextureRegion dst = {};
|
||
dst.texture = scene_texture_;
|
||
dst.w = static_cast<Uint32>(tex_width_);
|
||
dst.h = static_cast<Uint32>(tex_height_);
|
||
dst.d = 1;
|
||
|
||
SDL_UploadToGPUTexture(copy, &src, &dst, false);
|
||
SDL_EndGPUCopyPass(copy);
|
||
}
|
||
|
||
// ---- Acquire swapchain texture ----
|
||
SDL_GPUTexture* swapchain = nullptr;
|
||
Uint32 sw = 0;
|
||
Uint32 sh = 0;
|
||
if (!SDL_AcquireGPUSwapchainTexture(cmd, window_, &swapchain, &sw, &sh)) {
|
||
SDL_Log("SDL3GPUShader: SDL_AcquireGPUSwapchainTexture failed: %s", SDL_GetError());
|
||
SDL_SubmitGPUCommandBuffer(cmd);
|
||
return;
|
||
}
|
||
if (swapchain == nullptr) {
|
||
// Window minimized — skip frame
|
||
SDL_SubmitGPUCommandBuffer(cmd);
|
||
return;
|
||
}
|
||
|
||
// ---- Render pass: PostFX → swapchain ----
|
||
SDL_GPUColorTargetInfo color_target = {};
|
||
color_target.texture = swapchain;
|
||
color_target.load_op = SDL_GPU_LOADOP_CLEAR;
|
||
color_target.store_op = SDL_GPU_STOREOP_STORE;
|
||
color_target.clear_color = {.r = 0.0F, .g = 0.0F, .b = 0.0F, .a = 1.0F};
|
||
|
||
SDL_GPURenderPass* pass = SDL_BeginGPURenderPass(cmd, &color_target, 1, nullptr);
|
||
if (pass != nullptr) {
|
||
SDL_BindGPUGraphicsPipeline(pass, pipeline_);
|
||
|
||
// Calcular viewport usando las dimensiones lógicas del canvas (game_width_/height_),
|
||
// no las de la textura GPU (que pueden ser game×3 con supersampling).
|
||
// El GPU escala la textura para cubrir el viewport independientemente de su resolución.
|
||
float vx = 0.0F;
|
||
float vy = 0.0F;
|
||
float vw = 0.0F;
|
||
float vh = 0.0F;
|
||
if (integer_scale_) {
|
||
const int SCALE = std::max(1, std::min(static_cast<int>(sw) / game_width_, static_cast<int>(sh) / game_height_));
|
||
vw = static_cast<float>(game_width_ * SCALE);
|
||
vh = static_cast<float>(game_height_ * SCALE);
|
||
} else {
|
||
const float SCALE = std::min(
|
||
static_cast<float>(sw) / static_cast<float>(game_width_),
|
||
static_cast<float>(sh) / static_cast<float>(game_height_));
|
||
vw = static_cast<float>(game_width_) * SCALE;
|
||
vh = static_cast<float>(game_height_) * SCALE;
|
||
}
|
||
vx = std::floor((static_cast<float>(sw) - vw) * 0.5F);
|
||
vy = std::floor((static_cast<float>(sh) - vh) * 0.5F);
|
||
SDL_GPUViewport vp = {.x = vx, .y = vy, .w = vw, .h = vh, .min_depth = 0.0F, .max_depth = 1.0F};
|
||
SDL_SetGPUViewport(pass, &vp);
|
||
|
||
// pixel_scale: pixels físicos por pixel lógico de juego (para scanlines sin SS).
|
||
// Con SS las scanlines están horneadas en CPU → scanline_strength=0 → no se usa.
|
||
uniforms_.pixel_scale = (game_height_ > 0)
|
||
? (vh / static_cast<float>(game_height_))
|
||
: 1.0F;
|
||
uniforms_.time = static_cast<float>(SDL_GetTicks()) / 1000.0F;
|
||
uniforms_.oversample = static_cast<float>(oversample_);
|
||
|
||
// Con supersampling usamos LINEAR para que el escalado a zooms no-múltiplo-de-3
|
||
// promedia correctamente las filas de scanline horneadas en CPU.
|
||
SDL_GPUSampler* active_sampler = (oversample_ > 1 && linear_sampler_ != nullptr)
|
||
? linear_sampler_
|
||
: sampler_;
|
||
|
||
SDL_GPUTextureSamplerBinding binding = {};
|
||
binding.texture = scene_texture_;
|
||
binding.sampler = active_sampler;
|
||
SDL_BindGPUFragmentSamplers(pass, 0, &binding, 1);
|
||
|
||
SDL_PushGPUFragmentUniformData(cmd, 0, &uniforms_, sizeof(PostFXUniforms));
|
||
|
||
SDL_DrawGPUPrimitives(pass, 3, 1, 0, 0);
|
||
SDL_EndGPURenderPass(pass);
|
||
}
|
||
|
||
SDL_SubmitGPUCommandBuffer(cmd);
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// cleanup — libera pipeline/texturas/buffer pero mantiene device + swapchain
|
||
// ---------------------------------------------------------------------------
|
||
void SDL3GPUShader::cleanup() {
|
||
is_initialized_ = false;
|
||
|
||
if (device_ != nullptr) {
|
||
SDL_WaitForGPUIdle(device_);
|
||
|
||
if (pipeline_ != nullptr) {
|
||
SDL_ReleaseGPUGraphicsPipeline(device_, pipeline_);
|
||
pipeline_ = nullptr;
|
||
}
|
||
if (scene_texture_ != nullptr) {
|
||
SDL_ReleaseGPUTexture(device_, scene_texture_);
|
||
scene_texture_ = nullptr;
|
||
}
|
||
if (upload_buffer_ != nullptr) {
|
||
SDL_ReleaseGPUTransferBuffer(device_, upload_buffer_);
|
||
upload_buffer_ = nullptr;
|
||
}
|
||
if (sampler_ != nullptr) {
|
||
SDL_ReleaseGPUSampler(device_, sampler_);
|
||
sampler_ = nullptr;
|
||
}
|
||
if (linear_sampler_ != nullptr) {
|
||
SDL_ReleaseGPUSampler(device_, linear_sampler_);
|
||
linear_sampler_ = nullptr;
|
||
}
|
||
// device_ y el claim de la ventana se mantienen vivos
|
||
}
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// destroy — limpieza completa incluyendo device y swapchain (solo al cerrar)
|
||
// ---------------------------------------------------------------------------
|
||
void SDL3GPUShader::destroy() {
|
||
cleanup();
|
||
|
||
if (device_ != nullptr) {
|
||
if (window_ != nullptr) {
|
||
SDL_ReleaseWindowFromGPUDevice(device_, window_);
|
||
}
|
||
SDL_DestroyGPUDevice(device_);
|
||
device_ = nullptr;
|
||
}
|
||
window_ = nullptr;
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Shader creation helpers
|
||
// ---------------------------------------------------------------------------
|
||
auto SDL3GPUShader::createShaderMSL(SDL_GPUDevice* device,
|
||
const char* msl_source,
|
||
const char* entrypoint,
|
||
SDL_GPUShaderStage stage,
|
||
Uint32 num_samplers,
|
||
Uint32 num_uniform_buffers) -> SDL_GPUShader* {
|
||
SDL_GPUShaderCreateInfo info = {};
|
||
info.code = reinterpret_cast<const Uint8*>(msl_source);
|
||
info.code_size = std::strlen(msl_source) + 1;
|
||
info.entrypoint = entrypoint;
|
||
info.format = SDL_GPU_SHADERFORMAT_MSL;
|
||
info.stage = stage;
|
||
info.num_samplers = num_samplers;
|
||
info.num_uniform_buffers = num_uniform_buffers;
|
||
SDL_GPUShader* shader = SDL_CreateGPUShader(device, &info);
|
||
if (shader == nullptr) {
|
||
SDL_Log("SDL3GPUShader: MSL shader '%s' failed: %s", entrypoint, SDL_GetError());
|
||
}
|
||
return shader;
|
||
}
|
||
|
||
auto SDL3GPUShader::createShaderSPIRV(SDL_GPUDevice* device, // NOLINT(readability-convert-member-functions-to-static)
|
||
const uint8_t* spv_code,
|
||
size_t spv_size,
|
||
const char* entrypoint,
|
||
SDL_GPUShaderStage stage,
|
||
Uint32 num_samplers,
|
||
Uint32 num_uniform_buffers) -> SDL_GPUShader* {
|
||
SDL_GPUShaderCreateInfo info = {};
|
||
info.code = spv_code;
|
||
info.code_size = spv_size;
|
||
info.entrypoint = entrypoint;
|
||
info.format = SDL_GPU_SHADERFORMAT_SPIRV;
|
||
info.stage = stage;
|
||
info.num_samplers = num_samplers;
|
||
info.num_uniform_buffers = num_uniform_buffers;
|
||
SDL_GPUShader* shader = SDL_CreateGPUShader(device, &info);
|
||
if (shader == nullptr) {
|
||
SDL_Log("SDL3GPUShader: SPIRV shader '%s' failed: %s", entrypoint, SDL_GetError());
|
||
}
|
||
return shader;
|
||
}
|
||
|
||
void SDL3GPUShader::setPostFXParams(const PostFXParams& p) {
|
||
uniforms_.vignette_strength = p.vignette;
|
||
uniforms_.chroma_strength = p.chroma;
|
||
uniforms_.mask_strength = p.mask;
|
||
uniforms_.gamma_strength = p.gamma;
|
||
uniforms_.curvature = p.curvature;
|
||
uniforms_.bleeding = p.bleeding;
|
||
uniforms_.flicker = p.flicker;
|
||
|
||
// Con supersampling las scanlines se hornean en CPU (uploadPixels).
|
||
// El shader recibe strength=0 para no aplicarlas de nuevo en GPU.
|
||
baked_scanline_strength_ = p.scanlines;
|
||
uniforms_.scanline_strength = (oversample_ > 1) ? 0.0F : p.scanlines;
|
||
}
|
||
|
||
void SDL3GPUShader::setVSync(bool vsync) {
|
||
vsync_ = vsync;
|
||
if (device_ != nullptr && window_ != nullptr) {
|
||
SDL_SetGPUSwapchainParameters(device_, window_, SDL_GPU_SWAPCHAINCOMPOSITION_SDR, vsync_ ? SDL_GPU_PRESENTMODE_VSYNC : SDL_GPU_PRESENTMODE_IMMEDIATE);
|
||
}
|
||
}
|
||
|
||
void SDL3GPUShader::setScaleMode(bool integer_scale) {
|
||
integer_scale_ = integer_scale;
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// setOversample — cambia el factor SS; recrea texturas si ya está inicializado
|
||
// ---------------------------------------------------------------------------
|
||
void SDL3GPUShader::setOversample(int factor) {
|
||
const int NEW_FACTOR = std::max(1, factor);
|
||
if (NEW_FACTOR == oversample_) { return; }
|
||
oversample_ = NEW_FACTOR;
|
||
if (is_initialized_) {
|
||
reinitTexturesAndBuffer();
|
||
// scanline_strength se actualizará en el próximo setPostFXParams
|
||
}
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// reinitTexturesAndBuffer — recrea scene_texture_ y upload_buffer_ con el
|
||
// tamaño actual (game × oversample_). No toca pipeline ni samplers.
|
||
// ---------------------------------------------------------------------------
|
||
auto SDL3GPUShader::reinitTexturesAndBuffer() -> bool {
|
||
if (device_ == nullptr) { return false; }
|
||
SDL_WaitForGPUIdle(device_);
|
||
|
||
if (scene_texture_ != nullptr) {
|
||
SDL_ReleaseGPUTexture(device_, scene_texture_);
|
||
scene_texture_ = nullptr;
|
||
}
|
||
if (upload_buffer_ != nullptr) {
|
||
SDL_ReleaseGPUTransferBuffer(device_, upload_buffer_);
|
||
upload_buffer_ = nullptr;
|
||
}
|
||
|
||
tex_width_ = game_width_ * oversample_;
|
||
tex_height_ = game_height_ * oversample_;
|
||
uniforms_.screen_height = static_cast<float>(tex_height_);
|
||
uniforms_.oversample = static_cast<float>(oversample_);
|
||
|
||
SDL_GPUTextureCreateInfo tex_info = {};
|
||
tex_info.type = SDL_GPU_TEXTURETYPE_2D;
|
||
tex_info.format = SDL_GPU_TEXTUREFORMAT_B8G8R8A8_UNORM;
|
||
tex_info.usage = SDL_GPU_TEXTUREUSAGE_SAMPLER;
|
||
tex_info.width = static_cast<Uint32>(tex_width_);
|
||
tex_info.height = static_cast<Uint32>(tex_height_);
|
||
tex_info.layer_count_or_depth = 1;
|
||
tex_info.num_levels = 1;
|
||
scene_texture_ = SDL_CreateGPUTexture(device_, &tex_info);
|
||
if (scene_texture_ == nullptr) {
|
||
SDL_Log("SDL3GPUShader: reinit — failed to create scene texture: %s", SDL_GetError());
|
||
return false;
|
||
}
|
||
|
||
SDL_GPUTransferBufferCreateInfo tb_info = {};
|
||
tb_info.usage = SDL_GPU_TRANSFERBUFFERUSAGE_UPLOAD;
|
||
tb_info.size = static_cast<Uint32>(tex_width_ * tex_height_ * 4);
|
||
upload_buffer_ = SDL_CreateGPUTransferBuffer(device_, &tb_info);
|
||
if (upload_buffer_ == nullptr) {
|
||
SDL_Log("SDL3GPUShader: reinit — failed to create upload buffer: %s", SDL_GetError());
|
||
SDL_ReleaseGPUTexture(device_, scene_texture_);
|
||
scene_texture_ = nullptr;
|
||
return false;
|
||
}
|
||
|
||
SDL_Log("SDL3GPUShader: oversample %d → texture %dx%d", oversample_, tex_width_, tex_height_);
|
||
return true;
|
||
}
|
||
|
||
} // namespace Rendering
|