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Indexed rendering. Not in main branch because breaks rendering code too much. Will merge in trunk along with more major graphics changes lat

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This commit is contained in:
ocornut
2015-04-09 21:05:35 +01:00
parent 500a8a0e02
commit 1746b04065
6 changed files with 210 additions and 125 deletions
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6
examples/opengl_example/imgui_impl_glfw.cpp
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@ -60,11 +60,11 @@ static void ImGui_ImplGlfw_RenderDrawLists(ImDrawList** const cmd_lists, int cmd
{
const ImDrawList* cmd_list = cmd_lists[n];
const unsigned char* vtx_buffer = (const unsigned char*)&cmd_list->vtx_buffer.front();
const ImDrawIdx* idx_buffer = (const unsigned short*)&cmd_list->idx_buffer.front();
glVertexPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, pos)));
glTexCoordPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, uv)));
glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, col)));
int vtx_offset = 0;
for (size_t cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i];
@ -76,9 +76,9 @@ static void ImGui_ImplGlfw_RenderDrawLists(ImDrawList** const cmd_lists, int cmd
{
glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->texture_id);
glScissor((int)pcmd->clip_rect.x, (int)(height - pcmd->clip_rect.w), (int)(pcmd->clip_rect.z - pcmd->clip_rect.x), (int)(pcmd->clip_rect.w - pcmd->clip_rect.y));
glDrawArrays(GL_TRIANGLES, vtx_offset, pcmd->vtx_count);
glDrawElements(GL_TRIANGLES, pcmd->idx_count, GL_UNSIGNED_SHORT, idx_buffer);
}
vtx_offset += pcmd->vtx_count;
idx_buffer += pcmd->idx_count;
}
}
#undef OFFSETOF