159 lines
4.8 KiB
Python
159 lines
4.8 KiB
Python
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#!/usr/bin/env python
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##########################################################################
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#
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# Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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# All Rights Reserved.
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sub license, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice (including the
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# next paragraph) shall be included in all copies or substantial portions
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# of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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# IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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# ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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##########################################################################
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from gallium import *
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def save_image(filename, surface):
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pixels = FloatArray(surface.height*surface.width*4)
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surface.get_tile_rgba(0, 0, surface.width, surface.height, pixels)
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import Image
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outimage = Image.new(
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mode='RGB',
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size=(surface.width, surface.height),
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color=(0,0,0))
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outpixels = outimage.load()
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for y in range(0, surface.height):
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for x in range(0, surface.width):
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offset = (y*surface.width + x)*4
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r, g, b, a = [int(pixels[offset + ch]*255) for ch in range(4)]
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outpixels[x, y] = r, g, b
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outimage.save(filename, "PNG")
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def test(dev):
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ctx = dev.context_create()
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width = 256
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height = 256
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# disabled blending/masking
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blend = Blend()
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blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE
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blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE
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blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO
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blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO
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blend.colormask = PIPE_MASK_RGBA
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ctx.set_blend(blend)
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# no-op depth/stencil/alpha
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depth_stencil_alpha = DepthStencilAlpha()
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ctx.set_depth_stencil_alpha(depth_stencil_alpha)
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# rasterizer
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rasterizer = Rasterizer()
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rasterizer.front_winding = PIPE_WINDING_CW
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rasterizer.cull_mode = PIPE_WINDING_NONE
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rasterizer.bypass_clipping = 1
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#rasterizer.bypass_vs = 1
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ctx.set_rasterizer(rasterizer)
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# viewport (identity, we setup vertices in wincoords)
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viewport = Viewport()
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scale = FloatArray(4)
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scale[0] = 1.0
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scale[1] = 1.0
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scale[2] = 1.0
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scale[3] = 1.0
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viewport.scale = scale
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translate = FloatArray(4)
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translate[0] = 0.0
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translate[1] = 0.0
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translate[2] = 0.0
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translate[3] = 0.0
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viewport.translate = translate
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ctx.set_viewport(viewport)
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# samplers
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sampler = Sampler()
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sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE
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sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE
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sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE
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sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE
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sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST
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sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST
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sampler.normalized_coords = 1
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ctx.set_sampler(0, sampler)
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# texture
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texture = dev.texture_create(PIPE_FORMAT_A8R8G8B8_UNORM, width, height, usage=PIPE_TEXTURE_USAGE_RENDER_TARGET)
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ctx.set_sampler_texture(0, texture)
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# drawing dest
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surface = texture.get_surface(usage = PIPE_BUFFER_USAGE_GPU_WRITE)
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fb = Framebuffer()
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fb.width = surface.width
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fb.height = surface.height
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fb.num_cbufs = 1
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fb.set_cbuf(0, surface)
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ctx.set_framebuffer(fb)
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# vertex shader
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# vs = Shader()
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#ctx.set_vertex_shader(vs)
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# fragment shader
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#fs = Shader()
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#ctx.set_fragment_shader(fs)
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if 0:
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nverts = 4
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nattrs = 1
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vertices = FloatArray(n_verts * nattrs * 4)
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# init vertex data that doesn't change
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for i in range(nverts):
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for j in range(nattrs):
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vertices[(i*nattrs +j)*4 + 0] = 0.0
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vertices[(i*nattrs +j)*4 + 1] = 0.0
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vertices[(i*nattrs +j)*4 + 2] = 0.0
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vertices[(i*nattrs +j)*4 + 3] = 0.0
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ctx.draw_vertices(PIPE_PRIM_TRIANGLE_FAN,
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4, # verts
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2, # attribs/vert
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vertices)
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else:
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ctx.draw_quad(32.0, 32.0, 224.0, 224.0)
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ctx.flush()
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save_image("simple.png", surface)
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def main():
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dev = Device(0)
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test(dev)
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if __name__ == '__main__':
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main()
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