| /* |
| * Copyright © 2015 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| */ |
| |
| #include "brw_context.h" |
| #include "brw_state.h" |
| #include "main/context.h" |
| #include "main/formatquery.h" |
| #include "main/glformats.h" |
| |
| static size_t |
| brw_query_samples_for_format(struct gl_context *ctx, GLenum target, |
| GLenum internalFormat, int samples[16]) |
| { |
| struct brw_context *brw = brw_context(ctx); |
| |
| (void) target; |
| (void) internalFormat; |
| |
| switch (brw->gen) { |
| case 9: |
| samples[0] = 16; |
| samples[1] = 8; |
| samples[2] = 4; |
| samples[3] = 2; |
| return 4; |
| |
| case 8: |
| samples[0] = 8; |
| samples[1] = 4; |
| samples[2] = 2; |
| return 3; |
| |
| case 7: |
| if (internalFormat == GL_RGBA32F && _mesa_is_gles(ctx)) { |
| /* For GLES, we are allowed to return a smaller number of samples for |
| * GL_RGBA32F. See OpenGLES 3.2 spec, section 20.3.1 Internal Format |
| * Query Parameters, under SAMPLES: |
| * |
| * "A value less than or equal to the value of MAX_SAMPLES, if |
| * internalformat is RGBA16F, R32F, RG32F, or RGBA32F." |
| * |
| * In brw_render_target_supported, we prevent formats with a size |
| * greater than 8 bytes from using 8x MSAA on gen7. |
| */ |
| samples[0] = 4; |
| return 1; |
| } else { |
| samples[0] = 8; |
| samples[1] = 4; |
| return 2; |
| } |
| |
| case 6: |
| samples[0] = 4; |
| return 1; |
| |
| default: |
| assert(brw->gen < 6); |
| samples[0] = 1; |
| return 1; |
| } |
| } |
| |
| void |
| brw_query_internal_format(struct gl_context *ctx, GLenum target, |
| GLenum internalFormat, GLenum pname, GLint *params) |
| { |
| /* The Mesa layer gives us a temporary params buffer that is guaranteed |
| * to be non-NULL, and have at least 16 elements. |
| */ |
| assert(params != NULL); |
| |
| switch (pname) { |
| case GL_SAMPLES: |
| brw_query_samples_for_format(ctx, target, internalFormat, params); |
| break; |
| |
| case GL_NUM_SAMPLE_COUNTS: { |
| size_t num_samples; |
| GLint dummy_buffer[16]; |
| |
| num_samples = brw_query_samples_for_format(ctx, target, internalFormat, |
| dummy_buffer); |
| params[0] = (GLint) num_samples; |
| break; |
| } |
| |
| default: |
| /* By default, we call the driver hook's fallback function from the frontend, |
| * which has generic implementation for all pnames. |
| */ |
| _mesa_query_internal_format_default(ctx, target, internalFormat, pname, |
| params); |
| break; |
| } |
| } |