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GL: Test a hack for emulating RTT

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wheremyfoodat 2025-02-25 16:25:47 +02:00
parent 4388f3d0f7
commit a303aae420
4 changed files with 22 additions and 17 deletions
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6
src/core/PICA/shader_gen_glsl.cpp
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@ -798,9 +798,9 @@ void main() {
vec4 colourAbs = abs(a_vertexColour);
v_colour = min(colourAbs, vec4(1.f));
v_texcoord0 = vec3(a_texcoord0.x, 1.0 - a_texcoord0.y, a_texcoord0_w);
v_texcoord1 = vec2(a_texcoord1.x, 1.0 - a_texcoord1.y);
v_texcoord2 = vec2(a_texcoord2.x, 1.0 - a_texcoord2.y);
v_texcoord0 = vec3(a_texcoord0.x, a_texcoord0.y, a_texcoord0_w);
v_texcoord1 = vec2(a_texcoord1.x, a_texcoord1.y);
v_texcoord2 = vec2(a_texcoord2.x, a_texcoord2.y);
v_view = a_view;
v_quaternion = a_quaternion;

5
src/core/renderer_gl/renderer_gl.cpp
View file

@ -361,6 +361,11 @@ void RendererGL::bindTexturesToSlots() {
u32 format = regs[ioBase + (i == 0 ? 13 : 5)] & 0xF;
glActiveTexture(GL_TEXTURE0 + i);
auto fb = getColourBuffer(addr, static_cast<PICA::ColorFmt>(format), width, height, false);
if (fb.has_value()) {
fb->texture.bind();
continue;
}
if (addr != 0) [[likely]] {
Texture targetTex(addr, static_cast<PICA::TextureFmt>(format), width, height, config);

22
src/core/renderer_gl/textures.cpp
View file

@ -248,17 +248,17 @@ u32 Texture::decodeTexel(u32 u, u32 v, PICA::TextureFmt fmt, std::span<const u8>
}
void Texture::decodeTexture(std::span<const u8> data) {
std::vector<u32> decoded;
decoded.reserve(u64(size.u()) * u64(size.v()));
std::vector<u32> decoded;
decoded.reserve(u64(size.u()) * u64(size.v()));
// Decode texels line by line
for (u32 v = 0; v < size.v(); v++) {
for (u32 u = 0; u < size.u(); u++) {
u32 colour = decodeTexel(u, v, format, data);
decoded.push_back(colour);
}
}
// Decode texels line by line
for (u32 v = size.v() - 1; s32(v) >= 0; v--) {
for (u32 u = 0; u < size.u(); u++) {
u32 colour = decodeTexel(u, v, format, data);
decoded.push_back(colour);
}
}
texture.bind();
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, size.u(), size.v(), GL_RGBA, GL_UNSIGNED_BYTE, decoded.data());
texture.bind();
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, size.u(), size.v(), GL_RGBA, GL_UNSIGNED_BYTE, decoded.data());
}

6
src/host_shaders/opengl_vertex_shader.vert
View file

@ -60,9 +60,9 @@ void main() {
v_colour = min(colourAbs, vec4(1.f));
// Flip y axis of UVs because OpenGL uses an inverted y for texture sampling compared to the PICA
v_texcoord0 = vec3(a_texcoord0.x, 1.0 - a_texcoord0.y, a_texcoord0_w);
v_texcoord1 = vec2(a_texcoord1.x, 1.0 - a_texcoord1.y);
v_texcoord2 = vec2(a_texcoord2.x, 1.0 - a_texcoord2.y);
v_texcoord0 = vec3(a_texcoord0.x, a_texcoord0.y, a_texcoord0_w);
v_texcoord1 = vec2(a_texcoord1.x, a_texcoord1.y);
v_texcoord2 = vec2(a_texcoord2.x, a_texcoord2.y);
v_view = a_view;
for (int i = 0; i < 6; i++) {