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possibly speed up software renderer

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This commit is contained in:
tildearrow 2025-04-09 09:23:33 -05:00
parent acf7a4f2ca
commit abd1bcf6e4
1 changed files with 6 additions and 13 deletions
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19
extern/imgui_software_renderer/imgui_sw.cpp vendored
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@ -22,12 +22,6 @@ struct ImGui_ImplSW_Data
ImGui_ImplSW_Data() { memset((void*)this, 0, sizeof(*this)); } ImGui_ImplSW_Data() { memset((void*)this, 0, sizeof(*this)); }
}; };
struct SwOptions
{
bool optimize_text = true;// No reason to turn this off.
bool optimize_rectangles = true;// No reason to turn this off.
};
static ImGui_ImplSW_Data* ImGui_ImplSW_GetBackendData() static ImGui_ImplSW_Data* ImGui_ImplSW_GetBackendData()
{ {
return ImGui::GetCurrentContext() ? (ImGui_ImplSW_Data*)ImGui::GetIO().BackendRendererUserData : nullptr; return ImGui::GetCurrentContext() ? (ImGui_ImplSW_Data*)ImGui::GetIO().BackendRendererUserData : nullptr;
@ -543,7 +537,6 @@ static void paint_draw_cmd(const PaintTarget &target,
const ImDrawVert *vertices, const ImDrawVert *vertices,
const ImDrawIdx *idx_buffer, const ImDrawIdx *idx_buffer,
const ImDrawCmd &pcmd, const ImDrawCmd &pcmd,
const SwOptions &options,
const ImVec2& white_uv) const ImVec2& white_uv)
{ {
const SWTexture* texture = (const SWTexture*)(pcmd.TextureId); const SWTexture* texture = (const SWTexture*)(pcmd.TextureId);
@ -556,7 +549,7 @@ static void paint_draw_cmd(const PaintTarget &target,
// Text is common, and is made of textured rectangles. So let's optimize for it. // Text is common, and is made of textured rectangles. So let's optimize for it.
// This assumes the ImGui way to layout text does not change. // This assumes the ImGui way to layout text does not change.
if (options.optimize_text && i + 6 <= pcmd.ElemCount && idx_buffer[i + 3] == idx_buffer[i + 0] if (i + 6 <= pcmd.ElemCount && idx_buffer[i + 3] == idx_buffer[i + 0]
&& idx_buffer[i + 4] == idx_buffer[i + 2]) { && idx_buffer[i + 4] == idx_buffer[i + 2]) {
ImDrawVert v3 = vertices[idx_buffer[i + 5]]; ImDrawVert v3 = vertices[idx_buffer[i + 5]];
@ -576,7 +569,7 @@ static void paint_draw_cmd(const PaintTarget &target,
// A lot of the big stuff are uniformly colored rectangles, // A lot of the big stuff are uniformly colored rectangles,
// so we can save a lot of CPU by detecting them: // so we can save a lot of CPU by detecting them:
if (options.optimize_rectangles && i + 6 <= pcmd.ElemCount) { if (i + 6 <= pcmd.ElemCount) {
ImDrawVert v3 = vertices[idx_buffer[i + 3]]; ImDrawVert v3 = vertices[idx_buffer[i + 3]];
ImDrawVert v4 = vertices[idx_buffer[i + 4]]; ImDrawVert v4 = vertices[idx_buffer[i + 4]];
ImDrawVert v5 = vertices[idx_buffer[i + 5]]; ImDrawVert v5 = vertices[idx_buffer[i + 5]];
@ -624,7 +617,7 @@ static void paint_draw_cmd(const PaintTarget &target,
} }
} }
static void paint_draw_list(const PaintTarget &target, const ImDrawList *cmd_list, const SwOptions &options) static void paint_draw_list(const PaintTarget &target, const ImDrawList *cmd_list)
{ {
const ImDrawIdx *idx_buffer = &cmd_list->IdxBuffer[0]; const ImDrawIdx *idx_buffer = &cmd_list->IdxBuffer[0];
const ImDrawVert *vertices = cmd_list->VtxBuffer.Data; const ImDrawVert *vertices = cmd_list->VtxBuffer.Data;
@ -635,20 +628,20 @@ static void paint_draw_list(const PaintTarget &target, const ImDrawList *cmd_lis
if (pcmd.UserCallback) { if (pcmd.UserCallback) {
pcmd.UserCallback(cmd_list, &pcmd); pcmd.UserCallback(cmd_list, &pcmd);
} else { } else {
paint_draw_cmd(target, vertices, idx_buffer, pcmd, options, white_uv); paint_draw_cmd(target, vertices, idx_buffer, pcmd, white_uv);
} }
idx_buffer += pcmd.ElemCount; idx_buffer += pcmd.ElemCount;
} }
} }
static void paint_imgui(uint32_t *pixels, ImDrawData *drawData, int fb_width, int fb_height, const SwOptions &options = {}) static void paint_imgui(uint32_t *pixels, ImDrawData *drawData, int fb_width, int fb_height)
{ {
if (fb_width <= 0 || fb_height <= 0) return; if (fb_width <= 0 || fb_height <= 0) return;
PaintTarget target{ pixels, fb_width, fb_height }; PaintTarget target{ pixels, fb_width, fb_height };
for (int i = 0; i < drawData->CmdListsCount; ++i) { for (int i = 0; i < drawData->CmdListsCount; ++i) {
paint_draw_list(target, drawData->CmdLists[i], options); paint_draw_list(target, drawData->CmdLists[i]);
} }
} }