svga: rename "tex_usage" to "bindings", add comments
Trivial.
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@ -402,25 +402,29 @@ static int svga_get_shader_param(struct pipe_screen *screen, unsigned shader, en
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}
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/**
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* Implemnt pipe_screen::is_format_supported().
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* \param bindings bitmask of PIPE_BIND_x flags
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*/
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static boolean
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svga_is_format_supported( struct pipe_screen *screen,
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enum pipe_format format,
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enum pipe_texture_target target,
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unsigned sample_count,
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unsigned tex_usage)
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unsigned bindings)
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{
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struct svga_screen *ss = svga_screen(screen);
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SVGA3dSurfaceFormat svga_format;
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SVGA3dSurfaceFormatCaps caps;
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SVGA3dSurfaceFormatCaps mask;
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assert(tex_usage);
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assert(bindings);
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if (sample_count > 1) {
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return FALSE;
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}
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svga_format = svga_translate_format(ss, format, tex_usage);
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svga_format = svga_translate_format(ss, format, bindings);
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if (svga_format == SVGA3D_FORMAT_INVALID) {
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return FALSE;
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}
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@ -430,7 +434,7 @@ svga_is_format_supported( struct pipe_screen *screen,
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* visuals for all virtual hardware implementations.
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*/
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if (tex_usage & PIPE_BIND_DISPLAY_TARGET) {
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if (bindings & PIPE_BIND_DISPLAY_TARGET) {
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switch (svga_format) {
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case SVGA3D_A8R8G8B8:
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case SVGA3D_X8R8G8B8:
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@ -456,13 +460,13 @@ svga_is_format_supported( struct pipe_screen *screen,
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svga_get_format_cap(ss, svga_format, &caps);
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mask.value = 0;
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if (tex_usage & PIPE_BIND_RENDER_TARGET) {
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if (bindings & PIPE_BIND_RENDER_TARGET) {
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mask.offscreenRenderTarget = 1;
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}
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if (tex_usage & PIPE_BIND_DEPTH_STENCIL) {
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if (bindings & PIPE_BIND_DEPTH_STENCIL) {
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mask.zStencil = 1;
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}
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if (tex_usage & PIPE_BIND_SAMPLER_VIEW) {
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if (bindings & PIPE_BIND_SAMPLER_VIEW) {
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mask.texture = 1;
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}
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