8 Commits

Author	SHA1	Message	Date
Benjamin Otte	153b78e2bc	gpu: Add a ShaderOp.print_instance vfunc ... ... and add gsk_shader_op_print() to do the generic stuff.	2024-03-15 19:49:17 +01:00
Benjamin Otte	6ed4eece04	gpu: debug-print the used shader clip ... When using GSK_DEBUG=verbose, print the clip mode used in the shader. Use cute little unicode indicators to not overload the debug output.	2024-02-11 20:04:54 +01:00
Benjamin Otte	1723ab34e1	gpu: Setup attribute locations ... Make the generator generate calls for the correct glBindAttribLocation() calls. Usually this was done correctly, but we can't rely on it. So do it explicitly.	2024-01-07 07:22:53 +01:00
Benjamin Otte	48c1f5fd27	gpu: Add supersampling for gradients ... Unless GSK_GPU_SKIP=gradients is given, we sample every point 4x instead of 1x. That makes the shader run slower (by roughly a factor of 2.5x) but it improves quality quite a bit.	2024-01-07 07:22:53 +01:00
Benjamin Otte	8032e30a76	gpu: Make linear gradients use variations	2024-01-07 07:22:53 +01:00
Benjamin Otte	d900407a18	gpu: Introduce the concept of "variation" ... A variation is a #define/specialization constant that every shader can use to specialize itself as it sees fit. This commit adds the infrastrcture, future commits will add implementations.	2024-01-07 07:22:53 +01:00
Benjamin Otte	8361949ba1	gpu: Handle >7 color stops ... If there are more than 7 color stops, we can split the gradient into multiple gradients with color stops like so: 0, 1, 2, 3, 4, 5, transparent transparent, 6, 7, 8, 9, 10, transparent ... transparent, n-2, n-1, n and use the new BLEND_ADD to draw them on top of each other. Adapt the testcae that tests this to use colors that work with the fancy algorithm we use now, so that BLEND_ADD and transitions to transparent do not cause issues.	2024-01-07 07:22:52 +01:00
Benjamin Otte	a031011e5e	gpu: Add a linear-gradient shader ... The shader can only deal with up to 7 color stops - but that's good enough for the real world. Plus, we have the uber shader. And if that fails, we can still fall back to Cairo. The code also doesn't handle repeating linear gradients yet.	2024-01-07 07:22:52 +01:00