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wined3d: Add core context P8 blit support to the GLSL blitter. 

We use GL_R8 for WINED3DFMT_P8_UINT in core contexts, since GL_ALPHA8 is not
available.

Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Henri Verbeet 2018-04-30 22:44:59 +04:30 committed by Alexandre Julliard
parent b9163e22e8
commit 71f24b8dbd
1 changed files with 3 additions and 2 deletions
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5
dlls/wined3d/glsl_shader.c
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@ -12318,8 +12318,9 @@ static void glsl_blitter_generate_p8_shader(struct wined3d_string_buffer *buffer
shader_addline(buffer, "uniform sampler1D sampler_palette;\n");
shader_addline(buffer, "\nvoid main()\n{\n");
/* The alpha-component contains the palette index. */
shader_addline(buffer, " float index = texture%s(sampler, out_texcoord.%s).w;\n",
needs_legacy_glsl_syntax(gl_info) ? tex_type : "", swizzle);
shader_addline(buffer, " float index = texture%s(sampler, out_texcoord.%s).%c;\n",
needs_legacy_glsl_syntax(gl_info) ? tex_type : "", swizzle,
gl_info->supported[WINED3D_GL_LEGACY_CONTEXT] ? 'w' : 'x');
/* Scale the index by 255/256 and add a bias of 0.5 in order to sample in
* the middle. */
shader_addline(buffer, " index = (index * 255.0 + 0.5) / 256.0;\n");