preliminary libretro GLSL shader support https://github.com/libretro/glsl-shaders
This commit is contained in:
FunkyFr3sh
parent
0e511f1a7d
commit
87450e320f
6 changed files with 284 additions and 34 deletions
239
src/render.c
239
src/render.c
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@ -21,7 +21,7 @@
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#include "main.h"
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#include "surface.h"
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const GLchar *PaletteVertShaderSrc =
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const GLchar *PassthroughVertShaderSrc =
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"//Vertex shader\n"
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"#version 110\n"
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"varying vec2 TexCoord0; \n"
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@ -80,6 +80,9 @@ DWORD WINAPI render_main(void)
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if (ddraw->render.maxfps == 0)
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ddraw->render.maxfps = 125;
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if (ddraw->render.maxfps >= 1000)
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ddraw->render.maxfps = 0;
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if (ddraw->render.maxfps > 0)
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frame_len = 1000.0f / ddraw->render.maxfps;
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@ -90,7 +93,14 @@ DWORD WINAPI render_main(void)
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GLuint paletteConvProgram = 0;
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if (glGetUniformLocation && glActiveTexture && glUniform1i)
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paletteConvProgram = OpenGL_BuildProgram(&PaletteVertShaderSrc, &PaletteFragShaderSrc);
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paletteConvProgram = OpenGL_BuildProgram(PassthroughVertShaderSrc, PaletteFragShaderSrc);
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GLuint scaleProgram = 0;
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if (glGenFramebuffers && glBindFramebuffer && glFramebufferTexture2D && glDrawBuffers &&
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glCheckFramebufferStatus && glUniform4f && glActiveTexture && glUniform1i &&
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glGetAttribLocation && glGenBuffers && glBindBuffer && glBufferData && glVertexAttribPointer &&
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glEnableVertexAttribArray && glUniform2fv && glUniformMatrix4fv)
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scaleProgram = OpenGL_BuildProgramFromFile(ddraw->shader);
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// primary surface texture
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GLuint surfaceTexId = 0;
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@ -125,22 +135,122 @@ DWORD WINAPI render_main(void)
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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while (glGetError() != GL_NO_ERROR);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 256, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
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if (glGetError() != GL_NO_ERROR)
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
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glViewport(
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ddraw->render.viewport.x, ddraw->render.viewport.y,
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ddraw->render.viewport.width, ddraw->render.viewport.height);
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glBindTexture(GL_TEXTURE_2D, 0);
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GLint surfaceUniLoc = 0, paletteUniLoc = 0;
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if (paletteConvProgram)
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{
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glUseProgram(paletteConvProgram);
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surfaceUniLoc = glGetUniformLocation(paletteConvProgram, "SurfaceTex");
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paletteUniLoc = glGetUniformLocation(paletteConvProgram, "PaletteTex");
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}
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GLint textureUniLoc = -1, texCoordUniLoc = -1, frameCountUniLoc = -1;
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GLuint frameBufferId = 0;
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GLuint frameBufferTexId = 0;
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GLuint vboBuffers[3];
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if (scaleProgram)
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{
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glUseProgram(scaleProgram);
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GLint vertexCoordUniLoc = glGetAttribLocation(scaleProgram, "VertexCoord");
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texCoordUniLoc = glGetAttribLocation(scaleProgram, "TexCoord");
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textureUniLoc = glGetUniformLocation(scaleProgram, "Texture");
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frameCountUniLoc = glGetUniformLocation(scaleProgram, "FrameCount");
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glGenBuffers(3, vboBuffers);
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glBindBuffer(GL_ARRAY_BUFFER, vboBuffers[0]);
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static const GLfloat vertexCoord[] = {
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-1.0f, 1.0f,
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1.0f, 1.0f,
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1.0f,-1.0f,
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-1.0f,-1.0f,
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};
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glBufferData(GL_ARRAY_BUFFER, sizeof(vertexCoord), vertexCoord, GL_STATIC_DRAW);
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glVertexAttribPointer(vertexCoordUniLoc, 2, GL_FLOAT, GL_FALSE, 0, NULL);
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glEnableVertexAttribArray(vertexCoordUniLoc);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vboBuffers[2]);
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static const GLushort indices[] =
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{
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0, 1, 2,
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0, 2, 3,
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};
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
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float inputSize[2], outputSize[2], textureSize[2];
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inputSize[0] = ddraw->width;
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inputSize[1] = ddraw->height;
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textureSize[0] = tex_width;
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textureSize[1] = tex_height;
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outputSize[0] = ddraw->render.viewport.width;
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outputSize[1] = ddraw->render.viewport.height;
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glUniform2fv(glGetUniformLocation(scaleProgram, "OutputSize"), 1, outputSize);
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glUniform2fv(glGetUniformLocation(scaleProgram, "TextureSize"), 1, textureSize);
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glUniform2fv(glGetUniformLocation(scaleProgram, "InputSize"), 1, inputSize);
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glUniform4f(glGetAttribLocation(scaleProgram, "Color"), 1, 1, 1, 1);
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glUniform1i(glGetUniformLocation(scaleProgram, "FrameDirection"), 1);
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const float mvpMatrix[16] = {
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1,0,0,0,
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0,1,0,0,
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0,0,1,0,
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0,0,0,1,
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};
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glUniformMatrix4fv(glGetUniformLocation(scaleProgram, "MVPMatrix"), 1, GL_FALSE, mvpMatrix);
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glGenFramebuffers(1, &frameBufferId);
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glBindFramebuffer(GL_FRAMEBUFFER, frameBufferId);
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glGenTextures(1, &frameBufferTexId);
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glBindTexture(GL_TEXTURE_2D, frameBufferTexId);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, tex_width, tex_height, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, frameBufferTexId, 0);
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GLenum drawBuffers[1] = { GL_COLOR_ATTACHMENT0 };
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glDrawBuffers(1, drawBuffers);
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if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
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{
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glDeleteTextures(1, &frameBufferTexId);
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if (glDeleteFramebuffers)
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glDeleteFramebuffers(1, &frameBufferId);
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if (glDeleteProgram)
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glDeleteProgram(scaleProgram);
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scaleProgram = 0;
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if (glDeleteBuffers)
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glDeleteBuffers(3, vboBuffers);
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}
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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}
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glBindTexture(GL_TEXTURE_2D, 0);
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glEnable(GL_TEXTURE_2D);
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while (ddraw->render.run && WaitForSingleObject(ddraw->render.sem, INFINITE) != WAIT_FAILED)
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@ -164,19 +274,6 @@ DWORD WINAPI render_main(void)
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if (ddraw->render.maxfps > 0)
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tick_start = timeGetTime();
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if (paletteConvProgram)
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{
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glActiveTexture(GL_TEXTURE0);
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glEnable(GL_TEXTURE_2D);
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glBindTexture(GL_TEXTURE_2D, paletteTexId);
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glUniform1i(paletteUniLoc, 0);
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glActiveTexture(GL_TEXTURE1);
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glEnable(GL_TEXTURE_2D);
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glBindTexture(GL_TEXTURE_2D, surfaceTexId);
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glUniform1i(surfaceUniLoc, 1);
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}
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EnterCriticalSection(&ddraw->cs);
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if (ddraw->primary && ddraw->primary->palette)
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@ -230,12 +327,90 @@ DWORD WINAPI render_main(void)
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glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, ddraw->width, ddraw->height, GL_RGBA, GL_UNSIGNED_BYTE, tex);
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}
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glBegin(GL_TRIANGLE_FAN);
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glTexCoord2f(0, 0); glVertex2f(-1, 1);
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glTexCoord2f(scale_w, 0); glVertex2f(1, 1);
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glTexCoord2f(scale_w, scale_h); glVertex2f(1, -1);
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glTexCoord2f(0, scale_h); glVertex2f(-1, -1);
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glEnd();
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if (paletteConvProgram)
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{
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glUseProgram(paletteConvProgram);
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glActiveTexture(GL_TEXTURE0);
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glEnable(GL_TEXTURE_2D);
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glBindTexture(GL_TEXTURE_2D, paletteTexId);
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glUniform1i(paletteUniLoc, 0);
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glActiveTexture(GL_TEXTURE1);
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glEnable(GL_TEXTURE_2D);
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glBindTexture(GL_TEXTURE_2D, surfaceTexId);
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glUniform1i(surfaceUniLoc, 1);
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glActiveTexture(GL_TEXTURE0);
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}
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if (scaleProgram)
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{
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// draw surface into framebuffer
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glBindFramebuffer(GL_FRAMEBUFFER, frameBufferId);
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glPushAttrib(GL_VIEWPORT_BIT);
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glViewport(0, 0, tex_width, tex_height);
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glBegin(GL_TRIANGLE_FAN);
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glTexCoord2f(0, 0); glVertex2f(-1, -1);
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glTexCoord2f(0, 1); glVertex2f(-1, 1);
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glTexCoord2f(1, 1); glVertex2f(1, 1);
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glTexCoord2f(1, 0); glVertex2f(1, -1);
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glEnd();
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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glPopAttrib();
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glActiveTexture(GL_TEXTURE1);
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glBindTexture(GL_TEXTURE_2D, 0);
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// apply filter
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glBindBuffer(GL_ARRAY_BUFFER, vboBuffers[1]);
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GLfloat texCoord[] = {
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0.0f, 0.0f,
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scale_w, 0.0f,
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scale_w, scale_h,
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0, scale_h,
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};
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glBufferData(GL_ARRAY_BUFFER, sizeof(texCoord), texCoord, GL_STATIC_DRAW);
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glVertexAttribPointer(texCoordUniLoc, 2, GL_FLOAT, GL_FALSE, 0, NULL);
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glEnableVertexAttribArray(texCoordUniLoc);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vboBuffers[2]);
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glUseProgram(scaleProgram);
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glActiveTexture(GL_TEXTURE0);
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glEnable(GL_TEXTURE_2D);
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glBindTexture(GL_TEXTURE_2D, frameBufferTexId);
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glUniform1i(textureUniLoc, 0);
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static int frames = 1;
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if (frameCountUniLoc != -1)
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glUniform1i(frameCountUniLoc, frames++);
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glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
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}
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else
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{
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glBegin(GL_TRIANGLE_FAN);
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glTexCoord2f(0, 0); glVertex2f(-1, 1);
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glTexCoord2f(scale_w, 0); glVertex2f(1, 1);
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glTexCoord2f(scale_w, scale_h); glVertex2f(1, -1);
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glTexCoord2f(0, scale_h); glVertex2f(-1, -1);
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glEnd();
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}
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if (scaleProgram && !paletteConvProgram)
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glUseProgram(0);
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glBindTexture(GL_TEXTURE_2D, 0);
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@ -253,14 +428,28 @@ DWORD WINAPI render_main(void)
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HeapFree(GetProcessHeap(), 0, tex);
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glDeleteTextures(1, &surfaceTexId);
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glDeleteTextures(1, &paletteTexId);
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if (glUseProgram)
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glUseProgram(0);
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if (scaleProgram)
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{
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glDeleteTextures(1, &frameBufferTexId);
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if (glDeleteBuffers)
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glDeleteBuffers(3, vboBuffers);
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if (glDeleteFramebuffers)
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glDeleteFramebuffers(1, &frameBufferId);
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}
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if (glDeleteProgram)
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{
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if (paletteConvProgram)
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glDeleteProgram(paletteConvProgram);
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if (scaleProgram)
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glDeleteProgram(scaleProgram);
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}
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wglMakeCurrent(NULL, NULL);
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