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Backends/Rendering/OpenGL3: Improve error handling

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Signed-off-by: Gabriel Ravier <gabravier@gmail.com>
This commit is contained in:
Gabriel Ravier 2020-04-11 23:28:31 +02:00
parent b45412992b
commit f2b2c071a2
1 changed files with 65 additions and 6 deletions
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71
src/Backends/Rendering/OpenGL3.cpp
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@ -289,7 +289,7 @@ static GLuint CompileShader(const char *vertex_shader_source, const char *fragme
glGetShaderiv(fragment_shader, GL_COMPILE_STATUS, &shader_status);
if (shader_status != GL_TRUE)
{
char buffer[0x200];
char buffer[0x400];
glGetShaderInfoLog(fragment_shader, sizeof(buffer), NULL, buffer);
Backend_ShowMessageBox("Fragment shader error", buffer);
return 0;
@ -306,7 +306,7 @@ static GLuint CompileShader(const char *vertex_shader_source, const char *fragme
glGetProgramiv(program_id, GL_LINK_STATUS, &shader_status);
if (shader_status != GL_TRUE)
{
char buffer[0x200];
char buffer[0x400];
glGetProgramInfoLog(program_id, sizeof(buffer), NULL, buffer);
Backend_ShowMessageBox("Shader linker error", buffer);
return 0;
@ -329,7 +329,14 @@ static VertexBufferSlot* GetVertexBufferSlot(unsigned int slots_needed)
while (current_vertex_buffer_slot + slots_needed > local_vertex_buffer_size)
local_vertex_buffer_size <<= 1;
local_vertex_buffer = (VertexBufferSlot*)realloc(local_vertex_buffer, local_vertex_buffer_size * sizeof(VertexBufferSlot));
VertexBufferSlot *reallocResult = (VertexBufferSlot *)realloc(local_vertex_buffer, local_vertex_buffer_size * sizeof(VertexBufferSlot));
if (reallocResult)
local_vertex_buffer = reallocResult;
else
{
Backend_PrintError("Couldn't expand vertex buffer");
return NULL;
}
}
current_vertex_buffer_slot += slots_needed;
@ -513,20 +520,72 @@ static void GlyphBatch_DestroyTexture(SPRITEBATCH_U64 texture_id, void *udata)
glDeleteTextures(1, &gl_texture_id);
}
static const char *GetOpenGLErrorCodeDescription(GLenum error_code)
{
switch (error_code)
{
case GL_NO_ERROR:
return "No error";
case GL_INVALID_ENUM:
return "An unacceptable value was specified for enumerated argument";
case GL_INVALID_VALUE:
return "A numeric argument is out of range";
case GL_INVALID_OPERATION:
return "The specified operation is not allowed in the current state";
case GL_INVALID_FRAMEBUFFER_OPERATION:
return "The framebuffer object is not complete";
case GL_OUT_OF_MEMORY:
return "There is not enough memory left to execute the command";
/*
* For some reason glad does not define these even though they are there in OpenGL 3.2
*/
/*
case GL_STACK_UNDERFLOW:
return "An attempt has been made to perform an operation that would cause an internal stack to underflow";
case GL_STACK_OVERFLOW:
return "An attempt has been made to perform an operation that would cause an internal stack to overflow";
*/
default:
return "Unknown error";
}
}
static void PostGLCallCallback(const char *name, void *function_pointer, int length_arguments, ...)
{
(void)function_pointer;
(void)length_arguments;
GLenum error_code = glad_glGetError(); // Manually use glad_glGetError. Otherwise, glad_debug_glGetError would be called and we'd get infinite recursion into this function
if (error_code != GL_NO_ERROR)
Backend_PrintError("Error %d in %s : %s", error_code, name, GetOpenGLErrorCodeDescription(error_code));
}
// ====================
// Render-backend initialisation
// ====================
RenderBackend_Surface* RenderBackend_Init(const char *window_title, int screen_width, int screen_height, BOOL fullscreen)
{
glad_set_post_callback(PostGLCallCallback);
actual_screen_width = screen_width;
actual_screen_height = screen_height;
if (WindowBackend_OpenGL_CreateWindow(window_title, &actual_screen_width, &actual_screen_height, fullscreen))
{
printf("GL_VENDOR = %s\n", glGetString(GL_VENDOR));
printf("GL_RENDERER = %s\n", glGetString(GL_RENDERER));
printf("GL_VERSION = %s\n", glGetString(GL_VERSION));
Backend_PrintInfo("GL_VENDOR = %s", glGetString(GL_VENDOR));
Backend_PrintInfo("GL_RENDERER = %s", glGetString(GL_RENDERER));
Backend_PrintInfo("GL_VERSION = %s", glGetString(GL_VERSION));
Backend_PrintInfo("GL_SHADING_LANGUAGE_VERSION = %s", glGetString(GL_SHADING_LANGUAGE_VERSION));
// Set up blending (only used for font-rendering)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);