blender-archive/source/blender/gpu/shaders/gpu_shader_text_vert.glsl


uniform mat4 ModelViewProjectionMatrix;

in vec4 pos; /* rect */
in vec4 tex; /* rect */
in vec4 col;

out vec4 pos_rect;
out vec4 tex_rect;
out vec4 color;

void main()
{
	pos_rect = pos;
	tex_rect = tex;
	color = col;
}
add GPU_SHADER_TEXT for font rendering With USE_GLSL enabled, GPU_basic_shader(TEXTURE\|COLOR) always rendered black. New shader uses a solid color + alpha channel of texture (which in our case is a font glyph). See fragment shader for details. I prefer this approah -- multiple shaders that each do one thing well (and are easy to read/write/understand), instead of one shader that can do many things given the right options. 2016-09-17 13:33:02 +02:00
BLF/OpenGL: draw text with new immediate mode Part of T49043 2016-10-11 14:36:16 -04:00			`uniform mat4 ModelViewProjectionMatrix;`
add GPU_SHADER_TEXT for font rendering With USE_GLSL enabled, GPU_basic_shader(TEXTURE\|COLOR) always rendered black. New shader uses a solid color + alpha channel of texture (which in our case is a font glyph). See fragment shader for details. I prefer this approah -- multiple shaders that each do one thing well (and are easy to read/write/understand), instead of one shader that can do many things given the right options. 2016-09-17 13:33:02 +02:00
BLF: Perf: Divide by 6 the amount of verts sent to the GPU. This means smaller imm buffer usage. This does not reduce the number of drawcalls. This uses geometry shader which is slow for the GPU but given we are really CPU bound on this case, it should not matter. A perfect implementation would: - Set the glyph coord in a bufferTexture and just send the glyph ID to the GPU to read the bufferTexture. - Use GWN_draw_primitive and draw 2*strllen triangle and just retrieve the glyph ID and color based on gl_VertexID / 6. - Stream fixed size buffer that the Driver can discard quickly but this is the same as improving IMM directly. 2018-03-29 20:22:31 +02:00			`in vec4 pos; /* rect */`
			`in vec4 tex; /* rect */`
			`in vec4 col;`

			`out vec4 pos_rect;`
			`out vec4 tex_rect;`
			`out vec4 color;`
add GPU_SHADER_TEXT for font rendering With USE_GLSL enabled, GPU_basic_shader(TEXTURE\|COLOR) always rendered black. New shader uses a solid color + alpha channel of texture (which in our case is a font glyph). See fragment shader for details. I prefer this approah -- multiple shaders that each do one thing well (and are easy to read/write/understand), instead of one shader that can do many things given the right options. 2016-09-17 13:33:02 +02:00
			`void main()`
			`{`
BFL: Fix broken vertical texts. I've made a separate version of the geom shader that works with full 3D modelviewmat. This commit also includes some fixup inside blf_batching_start(). 2018-03-30 22:50:17 +02:00			`pos_rect = pos;`
BLF: Perf: Divide by 6 the amount of verts sent to the GPU. This means smaller imm buffer usage. This does not reduce the number of drawcalls. This uses geometry shader which is slow for the GPU but given we are really CPU bound on this case, it should not matter. A perfect implementation would: - Set the glyph coord in a bufferTexture and just send the glyph ID to the GPU to read the bufferTexture. - Use GWN_draw_primitive and draw 2*strllen triangle and just retrieve the glyph ID and color based on gl_VertexID / 6. - Stream fixed size buffer that the Driver can discard quickly but this is the same as improving IMM directly. 2018-03-29 20:22:31 +02:00			`tex_rect = tex;`
			`color = col;`
add GPU_SHADER_TEXT for font rendering With USE_GLSL enabled, GPU_basic_shader(TEXTURE\|COLOR) always rendered black. New shader uses a solid color + alpha channel of texture (which in our case is a font glyph). See fragment shader for details. I prefer this approah -- multiple shaders that each do one thing well (and are easy to read/write/understand), instead of one shader that can do many things given the right options. 2016-09-17 13:33:02 +02:00			`}`