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Move OpenGL shader stuff to a struct

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The uniform naming scheme was already emulating this
This commit is contained in:
Clownacy 2020-09-15 14:13:45 +01:00
parent 6b96ada4a8
commit f0e1119a91
1 changed files with 52 additions and 31 deletions
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83
src/Backends/Rendering/OpenGL3.cpp
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@ -60,13 +60,34 @@ typedef struct VertexBufferSlot
Vertex vertices[2][3];
} VertexBufferSlot;
static GLuint program_texture;
static GLuint program_texture_colour_key;
static GLuint program_colour_fill;
static GLuint program_glyph;
static struct
{
GLuint id;
} program_texture;
static struct
{
GLuint id;
} program_texture_colour_key;
static struct
{
GLuint id;
struct
{
GLint colour;
} uniforms;
} program_colour_fill;
static struct
{
GLuint id;
struct
{
GLint colour;
} uniforms;
} program_glyph;
static GLint program_colour_fill_uniform_colour;
static GLint program_glyph_uniform_colour;
#ifndef USE_OPENGLES2
static GLuint vertex_array_id;
@ -463,16 +484,16 @@ RenderBackend_Surface* RenderBackend_Init(const char *window_title, size_t scree
glEnableVertexAttribArray(ATTRIBUTE_INPUT_VERTEX_COORDINATES);
// Set up our shaders
program_texture = CompileShader(vertex_shader_texture, fragment_shader_texture);
program_texture_colour_key = CompileShader(vertex_shader_texture, fragment_shader_texture_colour_key);
program_colour_fill = CompileShader(vertex_shader_plain, fragment_shader_colour_fill);
program_glyph = CompileShader(vertex_shader_texture, fragment_shader_glyph);
program_texture.id = CompileShader(vertex_shader_texture, fragment_shader_texture);
program_texture_colour_key.id = CompileShader(vertex_shader_texture, fragment_shader_texture_colour_key);
program_colour_fill.id = CompileShader(vertex_shader_plain, fragment_shader_colour_fill);
program_glyph.id = CompileShader(vertex_shader_texture, fragment_shader_glyph);
if (program_texture != 0 && program_texture_colour_key != 0 && program_colour_fill != 0 && program_glyph != 0)
if (program_texture.id != 0 && program_texture_colour_key.id != 0 && program_colour_fill.id != 0 && program_glyph.id != 0)
{
// Get shader uniforms
program_colour_fill_uniform_colour = glGetUniformLocation(program_colour_fill, "colour");
program_glyph_uniform_colour = glGetUniformLocation(program_glyph, "colour");
program_colour_fill.uniforms.colour = glGetUniformLocation(program_colour_fill.id, "colour");
program_glyph.uniforms.colour = glGetUniformLocation(program_glyph.id, "colour");
// Set up framebuffer (used for surface-to-surface blitting)
glGenFramebuffers(1, &framebuffer_id);
@ -503,17 +524,17 @@ RenderBackend_Surface* RenderBackend_Init(const char *window_title, size_t scree
return &framebuffer;
}
if (program_glyph != 0)
glDeleteProgram(program_glyph);
if (program_glyph.id != 0)
glDeleteProgram(program_glyph.id);
if (program_colour_fill != 0)
glDeleteProgram(program_colour_fill);
if (program_colour_fill.id != 0)
glDeleteProgram(program_colour_fill.id);
if (program_texture_colour_key != 0)
glDeleteProgram(program_texture_colour_key);
if (program_texture_colour_key.id != 0)
glDeleteProgram(program_texture_colour_key.id);
if (program_texture != 0)
glDeleteProgram(program_texture);
if (program_texture.id != 0)
glDeleteProgram(program_texture.id);
glDeleteBuffers(TOTAL_VBOS, vertex_buffer_ids);
#ifndef USE_OPENGLES2
@ -530,10 +551,10 @@ void RenderBackend_Deinit(void)
glDeleteTextures(1, &framebuffer.texture_id);
glDeleteFramebuffers(1, &framebuffer_id);
glDeleteProgram(program_glyph);
glDeleteProgram(program_colour_fill);
glDeleteProgram(program_texture_colour_key);
glDeleteProgram(program_texture);
glDeleteProgram(program_glyph.id);
glDeleteProgram(program_colour_fill.id);
glDeleteProgram(program_texture_colour_key.id);
glDeleteProgram(program_texture.id);
glDeleteBuffers(TOTAL_VBOS, vertex_buffer_ids);
#ifndef USE_OPENGLES2
glDeleteVertexArrays(1, &vertex_array_id);
@ -549,7 +570,7 @@ void RenderBackend_DrawScreen(void)
last_source_texture = 0;
last_destination_texture = 0;
glUseProgram(program_texture);
glUseProgram(program_texture.id);
glDisable(GL_BLEND);
@ -733,7 +754,7 @@ void RenderBackend_Blit(RenderBackend_Surface *source_surface, const RenderBacke
glViewport(0, 0, destination_surface->width, destination_surface->height);
// Switch to colour-key shader if we have to
glUseProgram(colour_key ? program_texture_colour_key : program_texture);
glUseProgram(colour_key ? program_texture_colour_key.id : program_texture.id);
glDisable(GL_BLEND);
@ -810,14 +831,14 @@ void RenderBackend_ColourFill(RenderBackend_Surface *surface, const RenderBacken
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, surface->texture_id, 0);
glViewport(0, 0, surface->width, surface->height);
glUseProgram(program_colour_fill);
glUseProgram(program_colour_fill.id);
glDisable(GL_BLEND);
// Disable texture coordinate array, since this doesn't use textures
glDisableVertexAttribArray(ATTRIBUTE_INPUT_TEXTURE_COORDINATES);
glUniform4f(program_colour_fill_uniform_colour, red / 255.0f, green / 255.0f, blue / 255.0f, 1.0f);
glUniform4f(program_colour_fill.uniforms.colour, red / 255.0f, green / 255.0f, blue / 255.0f, 1.0f);
}
// Add data to the vertex queue
@ -923,8 +944,8 @@ void RenderBackend_PrepareToDrawGlyphs(RenderBackend_GlyphAtlas *atlas, RenderBa
last_green = green;
last_blue = blue;
glUseProgram(program_glyph);
glUniform4f(program_glyph_uniform_colour, red / 255.0f, green / 255.0f, blue / 255.0f, 1.0f);
glUseProgram(program_glyph.id);
glUniform4f(program_glyph.uniforms.colour, red / 255.0f, green / 255.0f, blue / 255.0f, 1.0f);
// Point our framebuffer to the destination texture
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, glyph_destination_surface->texture_id, 0);