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Handle a malloc failure better

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No memory leak
This commit is contained in:
Clownacy 2020-01-20 14:48:12 +00:00
parent 23eed95ff4
commit 767262ed8c
1 changed files with 66 additions and 62 deletions
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128
src/Backends/Rendering/OpenGL3.cpp
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@ -464,11 +464,7 @@ Backend_Surface* Backend_Init(SDL_Window *p_window)
program_glyph_subpixel_part1 = CompileShader(vertex_shader_texture, fragment_shader_glyph_subpixel_part1);
program_glyph_subpixel_part2 = CompileShader(vertex_shader_texture, fragment_shader_glyph_subpixel_part2);
if (program_texture == 0 || program_texture_colour_key == 0 || program_colour_fill == 0 || program_glyph_normal == 0 || program_glyph_subpixel_part1 == 0 || program_glyph_subpixel_part2 == 0)
{
printf("Failed to compile shaders\n");
}
else
if (program_texture != 0 && program_texture_colour_key != 0 && program_colour_fill != 0 && program_glyph_normal != 0 && program_glyph_subpixel_part1 != 0 && program_glyph_subpixel_part2 != 0)
{
// Get shader uniforms
program_colour_fill_uniform_colour = glGetUniformLocation(program_colour_fill, "colour");
@ -836,72 +832,80 @@ Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width
{
Backend_Glyph *glyph = (Backend_Glyph*)malloc(sizeof(Backend_Glyph));
if (glyph == NULL)
return NULL;
const unsigned int destination_pitch = (width + 3) & ~3; // Round up to the nearest 4 (OpenGL needs this)
unsigned char *buffer = (unsigned char*)malloc(destination_pitch * height);
switch (pixel_mode)
if (glyph != NULL)
{
case FONT_PIXEL_MODE_LCD:
case FONT_PIXEL_MODE_GRAY:
for (unsigned int y = 0; y < height; ++y)
const unsigned int destination_pitch = (width + 3) & ~3; // Round up to the nearest 4 (OpenGL needs this)
unsigned char *buffer = (unsigned char*)malloc(destination_pitch * height);
if (buffer != NULL)
{
switch (pixel_mode)
{
const unsigned char *source_pointer = pixels + y * pitch;
unsigned char *destination_pointer = buffer + y * destination_pitch;
memcpy(destination_pointer, source_pointer, width);
case FONT_PIXEL_MODE_LCD:
case FONT_PIXEL_MODE_GRAY:
for (unsigned int y = 0; y < height; ++y)
{
const unsigned char *source_pointer = pixels + y * pitch;
unsigned char *destination_pointer = buffer + y * destination_pitch;
memcpy(destination_pointer, source_pointer, width);
}
break;
case FONT_PIXEL_MODE_MONO:
for (unsigned int y = 0; y < height; ++y)
{
const unsigned char *source_pointer = pixels + y * pitch;
unsigned char *destination_pointer = buffer + y * destination_pitch;
for (unsigned int x = 0; x < width; ++x)
*destination_pointer++ = (*source_pointer++ ? 0xFF : 0);
}
break;
}
break;
GLint previously_bound_texture;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &previously_bound_texture);
case FONT_PIXEL_MODE_MONO:
for (unsigned int y = 0; y < height; ++y)
{
const unsigned char *source_pointer = pixels + y * pitch;
unsigned char *destination_pointer = buffer + y * destination_pitch;
glGenTextures(1, &glyph->texture_id);
glBindTexture(GL_TEXTURE_2D, glyph->texture_id);
#ifdef USE_OPENGLES2
if (pixel_mode == FONT_PIXEL_MODE_LCD)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width / 3, height, 0, GL_RGB, GL_UNSIGNED_BYTE, buffer);
else
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, width, height, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, buffer);
#else
if (pixel_mode == FONT_PIXEL_MODE_LCD)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, width / 3, height, 0, GL_RGB, GL_UNSIGNED_BYTE, buffer);
else
glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, buffer);
#endif
for (unsigned int x = 0; x < width; ++x)
*destination_pointer++ = (*source_pointer++ ? 0xFF : 0);
}
free(buffer);
break;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
#ifndef USE_OPENGLES2
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
#endif
glBindTexture(GL_TEXTURE_2D, previously_bound_texture);
glyph->width = (pixel_mode == FONT_PIXEL_MODE_LCD ? width / 3 : width);
glyph->height = height;
glyph->pixel_mode = pixel_mode;
return glyph;
}
free(glyph);
}
GLint previously_bound_texture;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &previously_bound_texture);
glGenTextures(1, &glyph->texture_id);
glBindTexture(GL_TEXTURE_2D, glyph->texture_id);
#ifdef USE_OPENGLES2
if (pixel_mode == FONT_PIXEL_MODE_LCD)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width / 3, height, 0, GL_RGB, GL_UNSIGNED_BYTE, buffer);
else
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, width, height, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, buffer);
#else
if (pixel_mode == FONT_PIXEL_MODE_LCD)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, width / 3, height, 0, GL_RGB, GL_UNSIGNED_BYTE, buffer);
else
glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, buffer);
#endif
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
#ifndef USE_OPENGLES2
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
#endif
glyph->width = (pixel_mode == FONT_PIXEL_MODE_LCD ? width / 3 : width);
glyph->height = height;
glyph->pixel_mode = pixel_mode;
free(buffer);
glBindTexture(GL_TEXTURE_2D, previously_bound_texture);
return glyph;
return NULL;
}
void Backend_UnloadGlyph(Backend_Glyph *glyph)