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GLES2: batch non joined lines (see #4964)

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Sylvain 2021-11-15 09:36:18 +01:00
parent 17f156fae5
commit 92f2fdfc84
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GPG Key ID: 5F87E02E5BC0939E
1 changed files with 25 additions and 1 deletions
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26
src/render/opengles2/SDL_render_gles2.c
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@ -1136,7 +1136,31 @@ GLES2_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *ver
case SDL_RENDERCMD_DRAW_LINES: {
if (SetDrawState(data, cmd, GLES2_IMAGESOURCE_SOLID) == 0) {
data->glDrawArrays(GL_LINE_STRIP, 0, (GLsizei) cmd->data.draw.count);
size_t count = cmd->data.draw.count;
if (count > 2) {
/* joined lines cannot be grouped */
data->glDrawArrays(GL_LINE_STRIP, 0, (GLsizei)count);
} else {
/* let's group non joined lines */
SDL_RenderCommand *finalcmd = cmd;
SDL_RenderCommand *nextcmd = cmd->next;
while (nextcmd != NULL) {
const SDL_RenderCommandType nextcmdtype = nextcmd->command;
if (nextcmdtype != SDL_RENDERCMD_DRAW_LINES) {
break; /* can't go any further on this draw call, different render command up next. */
} else if (nextcmd->data.draw.count != 2) {
break; /* can't go any further on this draw call, those are joined lines */
} else {
finalcmd = nextcmd; /* we can combine copy operations here. Mark this one as the furthest okay command. */
count += cmd->data.draw.count;
}
nextcmd = nextcmd->next;
}
data->glDrawArrays(GL_LINES, 0, (GLsizei)count);
cmd = finalcmd; /* skip any copy commands we just combined in here. */
}
}
break;
}