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init rework (2)

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This commit is contained in:
nullifiedcat 2017-11-15 17:49:34 +03:00
parent 86968e2ba7
commit 15a74fccaf
3 changed files with 106 additions and 22 deletions
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17
include/program.h Normal file
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@ -0,0 +1,17 @@
#pragma once
#include <vertex-buffer.h>
struct program_t
{
unsigned shader;
vertex_buffer_t *buffer;
};
struct program_t program;
void
program_init();
void
program_draw();

86
src/program.c Normal file
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@ -0,0 +1,86 @@
GLuint compile_shader(const char *source, GLenum type)
{
GLint status;
GLuint shader = glCreateShader(type);
glShaderSource(shader, 1, &source, 0);
glCompileShader(shader);
glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
if (status == GL_FALSE)
{
char error_log[256];
glGetShaderInfoLog(shader, sizeof(error_log), NULL, error_log);
log_write("GL Shader compilation error:\n%s\n", error_log);
exit(1);
}
return shader;
}
void
setup_matrices(GLuint shader, int textures)
{
glUseProgram(shader);
glUniformMatrix4fv(glGetUniformLocation(shader, "model"), 1, 0, ds.model.data);
glUniformMatrix4fv(glGetUniformLocation(shader, "view"), 1, 0, ds.view.data);
glUniformMatrix4fv(glGetUniformLocation(shader, "projection"), 1, 0, ds.projection.data);
glUniform1i(glGetUniformLocation(shader, "texture"), 0);
glUseProgram(0);
}
const char *shader_ultimate_vert =
"uniform mat4 model;\n"
"uniform mat4 view;\n"
"uniform mat4 projection;\n"
"attribute vec2 vertex;\n"
"attribute vec2 tex_coord;\n"
"attribute vec4 color;\n"
"attribute uint draw_mode;\n"
"flat out uint frag_DrawMode;\n"
"void main()\n"
"{\n"
" gl_TexCoord[0].xy = tex_coord.xy;\n"
" gl_FrontColor = color;\n"
" gl_Position = projection*(view*(model*vec4(vertex,0.0,1.0)));\n"
" frag_DrawMode = draw_mode;\n"
"}";
const char *shader_ultimate_frag =
"uniform sampler2D texture;\n"
"flat in uint frag_DrawMode\n"
"void main()\n"
"{\n"
" if (frag_DrawMode == 1)\n"
" gl_FragColor = gl_Color;\n"
" else\n"
" {\n"
" vec4 tex = texture2D(texture, gl_TexCoord[0].xy);\n"
" if (frag_DrawMode == 2)\n"
" gl_FragColor = gl_Color * tex\n"
" else if (frag_DrawMode == 3)\n"
" gl_FragColor = vec4(gl_Color.rgb, gl_Color.a * texture2D(texture, gl_TexCoord[0].xy).r);\n"
" else\n"
" gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);\n"
"}";
void
program_init()
{
program.buffer = vertex_buffer_new("vertex:2f,tex_coord:2f,color:4f,draw_mode:1I");
program.shader = glCreateProgram();
GLint status;
GLuint sh_frag = compile_shader(shader_ultimate_frag, GL_FRAGMENT_SHADER);
glAttachShader(program->shader, sh_frag);
glDeleteShader(sh_frag);
GLuint sh_vert = compile_shader(shader_ultimate_vert, GL_VERTEX_SHADER);
glAttachShader(program->shader, sh_vert);
glDeleteShader(sh_vert);
glLinkProgram(program->shader);
glGetProgramiv(program->shader, GL_LINK_STATUS, &status);
if (status == GL_FALSE)
{
char error_log[256];
glGetShaderInfoLog(program->shader, sizeof(error_log), NULL, error_log);
log_write("GL Shader linking error:\n%s\n", error_log);
exit(1);
}
}

25
src/programs.c
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@ -95,28 +95,9 @@ const char *shader_v2ft2fc4f_vert =
"uniform mat4 model;\n"
"uniform mat4 view;\n"
"uniform mat4 projection;\n"
"attribute vec2 vertex;\n"
"attribute vec2 tex_coord;\n"
"attribute vec4 color;\n"
"void main()\n"
"{\n"
" gl_TexCoord[0].xy = tex_coord.xy;\n"
" gl_FrontColor = color;\n"
" gl_Position = projection*(view*(model*vec4(vertex,0.0,1.0)));\n"
"}";
const char *shader_v2ft2fc4f_frag =
"uniform sampler2D texture;\n"
"void main()\n"
"{\n"
" vec4 tex = texture2D(texture, gl_TexCoord[0].xy);\n"
" gl_FragColor = vec4(gl_Color.rgb * tex.rgb, gl_Color.a*tex.a);\n"
"}";
const char *shader_v2ft2fc4f_freetype_frag =
"uniform sampler2D texture;\n"
"void main()\n"
"{\n"
" gl_FragColor = vec4(gl_Color.rgb, gl_Color.a * texture2D(texture, gl_TexCoord[0].xy).r);\n"
"}";
void
program_init_everything()