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OpenGL: Attempt to fix OpenGL ES 2 rendering

This commit is contained in:
Jeffrey Pfau 2016-01-17 14:46:45 -08:00
parent c18b9c3a64
commit 05c3159916
1 changed files with 22 additions and 4 deletions
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26
src/platform/opengl/gles2.c
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@ -13,6 +13,13 @@
#define MAX_PASSES 8
static const GLchar* const _gles2Header =
"#version 100\n"
"precision mediump float;\n";
static const GLchar* const _gl3Header =
"#version 120\n";
static const char* const _vertexShader =
"attribute vec4 position;\n"
"varying vec2 texCoord;\n"
@ -327,16 +334,27 @@ void GBAGLES2ShaderInit(struct GBAGLES2Shader* shader, const char* vs, const cha
shader->program = glCreateProgram();
shader->vertexShader = glCreateShader(GL_VERTEX_SHADER);
shader->fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
const GLchar* shaderBuffer[2];
const GLubyte* version = glGetString(GL_VERSION);
if (strncmp((const char*) version, "OpenGL ES ", strlen("OpenGL ES "))) {
shaderBuffer[0] = _gl3Header;
} else {
shaderBuffer[0] = _gles2Header;
}
if (vs) {
glShaderSource(shader->vertexShader, 1, (const GLchar**) &vs, 0);
shaderBuffer[1] = vs;
} else {
glShaderSource(shader->vertexShader, 1, (const GLchar**) &_nullVertexShader, 0);
shaderBuffer[1] = _nullVertexShader;
}
glShaderSource(shader->vertexShader, 2, shaderBuffer, 0);
if (fs) {
glShaderSource(shader->fragmentShader, 1, (const GLchar**) &fs, 0);
shaderBuffer[1] = fs;
} else {
glShaderSource(shader->fragmentShader, 1, (const GLchar**) &_nullFragmentShader, 0);
shaderBuffer[1] = _nullFragmentShader;
}
glShaderSource(shader->fragmentShader, 2, shaderBuffer, 0);
glAttachShader(shader->program, shader->vertexShader);
glAttachShader(shader->program, shader->fragmentShader);
char log[1024];